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Journal of the Optical Society of America B

Journal of the Optical Society of America B


  • Editor: Henry van Driel
  • Vol. 29, Iss. 2 — Feb. 1, 2012
  • pp: A146–A153

Oscillatory acoustic phonon relaxation of excitons in quantum dot molecules

Juan E. Rolon, Kushal C. Wijesundara, Sergio E. Ulloa, Allan S. Bracker, Daniel Gammon, and Eric A. Stinaff  »View Author Affiliations

JOSA B, Vol. 29, Issue 2, pp. A146-A153 (2012)

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We study electrically tunable self-assembled InAs quantum dot molecules through photoluminescence (PL) and time-resolved PL measurements. For the model we assume quantum dots with cylindrical symmetry, for which the confinement potentials have been modeled as narrow quantum wells in the growth and in-plane directions matched to parabolic potentials. We focus on the hole scattering rates by bulk acoustic phonons, as these rates are the leading contribution for the neutral indirect exciton relaxation rate when the electron localizes primarily on one dot. The hole–phonon scattering structure factor for acoustic phonons is found to contain a phase relationship between the phonon wave and the hole wave function, which can be tuned by an external electric field. The phase relationship leads to interference effects and tunable oscillatory relaxation rates of indirect excitons, in agreement with experiments.

© 2012 Optical Society of America

OCIS Codes
(270.2500) Quantum optics : Fluctuations, relaxations, and noise
(320.4240) Ultrafast optics : Nanosecond phenomena
(320.7080) Ultrafast optics : Ultrafast devices
(290.5825) Scattering : Scattering theory

Original Manuscript: October 4, 2011
Revised Manuscript: December 10, 2011
Manuscript Accepted: December 11, 2011
Published: February 3, 2012

Juan E. Rolon, Kushal C. Wijesundara, Sergio E. Ulloa, Allan S. Bracker, Daniel Gammon, and Eric A. Stinaff, "Oscillatory acoustic phonon relaxation of excitons in quantum dot molecules," J. Opt. Soc. Am. B 29, A146-A153 (2012)

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  1. U. Bockelmann and G. Bastard, “Phonon scattering and energy relaxation in two-, one-, and zero-dimensional electron gases,” Phys. Rev. B 42, 8947–8951 (1990). [CrossRef]
  2. B. Ohnesorge, M. Albrecht, J. Oshinowo, A. Forchel, and Y. Arakawa, “Rapid carrier relaxation in self-assembled InxGa1−xAs/GaAs quantum dots,” Phys. Rev. B 54, 11532–11538(1996). [CrossRef]
  3. P. Borri, W. Langbein, U. Woggon, M. Schwab, M. Bayer, S. Fafard, Z. Wasilewski, and P. Hawrylak, “Exciton dephasing in quantum dot molecules,” Phys. Rev. Lett. 91, 267401 (2003). [CrossRef]
  4. J. I. Climente, A. Bertoni, G. Goldoni, and E. Molinari, “Phonon-induced electron relaxation in weakly confined single and coupled quantum dots,” Phys. Rev. B 74, 035313 (2006). [CrossRef]
  5. J. I. Climente, A. Bertoni, G. Goldoni, and E. Molinari, “Directionality of acoustic-phonon emission in weakly confined semiconductor quantum dots,” Phys. Rev. B 75, 245330 (2007). [CrossRef]
  6. J. E. Rolon, “Coherent exciton phenomena in quantum dot molecules,” Ph.D. thesis (Ohio University, 2011).
  7. K. C. Wijesundara, J. E. Rolon, S. E. Ulloa, A. S. Bracker, D. Gammon, and E. A. Stinaff, “Tunable exciton relaxation in vertically coupled semiconductor InAs quantum dots,” Phys. Rev. B 84, 081404(R) (2011). [CrossRef]
  8. E. A. Stinaff, M. Scheibner, A. S. Bracker, I. V. Ponomarev, V. L. Korenev, M. E. Ware, M. F. Doty, T. L. Reinecke, and D. Gammon, Science 311, 636–639 (2006). [CrossRef]
  9. A. O. Govorov, “Spin-Förster transfer in optically excited quantum dots,” Phys. Rev. B 71, 155323 (2005). [CrossRef]
  10. A. Nazir, B. W. Lovett, S. D. Barrett, J. H. Reina, and G. A. D. Briggs, “Anticrossings in Förster coupled quantum dots,” Phys. Rev. B 71, 045334 (2005). [CrossRef]
  11. S. M. Reimann and M. Manninen, “Electronic structure of quantum dots,” Rev. Mod. Phys. 74, 1283–1342(2002). [CrossRef]
  12. A. S. Bracker, M. Scheibner, M. F. Doty, E. A. Stinaff, I. V. Ponomarev, J. C. Kim, L. J. Whitman, T. L. Reinecke, and D. Gammon, “Engineering electron and hole tunneling with asymmetric InAs quantum dot molecules,” Appl. Phys. Lett. 89, 233110 (2006). [CrossRef]
  13. V. F. Gantmakher and Y. B. Levinson, Carrier Scattering in Metals and Semiconductors, Modern Problems in Condensed Matter Sciences (Elsevier Science, 1987).
  14. V. Mlinar, M. Bozkurt, J. M. Ulloa, M. Ediger, G. Bester, A. Badolato, P. M. Koenraad, R. J. Warburton, and A. Zunger, “Structure of quantum dots as seen by excitonic spectroscopy versus structural characterization: using theory to close the loop,” Phys. Rev. B. 80, 165425 (2009). [CrossRef]
  15. E. L. Ivchenko and G. E. Pikus, Superlattices and Other Heterostructures (Springer, 1995).

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